For 9mm ammunition, you ought to use *small pistol primers*. Below are a few particular recommendations and issues: ### Primer Style - *Small Pistol Primer*: This is actually the standard primer used for reloading 9mm ammo. Brand names like CCI, Federal, Winchester, and Remington all make trusted smaller pistol primers. https://winchester-200-primers46789.total-blog.com/think-about-dependable-brand-names-known-for-quality-and-trustworthiness-56718106